Lesson: Coherent Light Physics • Third Year of Secondary School

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In this lesson, we will learn how to determine whether two or more electromagnetic waves will interfere to form coherent or incoherent light.

Students will be able to

recognize that two or more waves are coherent if they have the same frequency and a constant phase difference from each other,
recognize that two or more waves are incoherent if they have different frequencies or a nonconstant phase difference from each other,
determine, by looking at the waveforms, whether a set of waves are coherent or incoherent,
determine, by looking at functions that describe basic waveforms, whether a set of waves are coherent or incoherent.